That’s how experts yesterday explained the chilling videotape and photos Virginia Tech gunman Cho Seung-Hui made of himself during his murderous rampage and then sent in a package to NBC in New York.

“I saw a picture of pure evil in those photographs,” said Dr. Robert Butterworth, a Los Angeles clinical psychologist. “He knew he would be famous and wanted to make sure of that.”

By mailing the package to NBC between the shootings, Butterworth said, Cho wanted to cement his legacy.

“He was getting ready to be remembered forever,” Butterworth said. “You can be psychotic, but still have a plan. This wasn’t a fit of rage. He was calm and methodical.”

Butterworth said other photographs showing Cho holding a knife to his throat and another of him pointing a Glock at the camera are signs he was “showing all of us his evil side.

“He was a wimp, a loner, someone whom girls didn’t notice,” he said. “He wanted to be remembered more in death than in life.”

Aaron Cohen, a former member of Israel’s Special Forces counter-terrorism unit and a security expert who has profiled criminals, said Cho used the videos – particularly the image of him pointing a gun at his temple – to demonstrate to everyone that he “wasn’t afraid of anyone.”

“He acts obsessive and delusional,” Cohen said. “He is angry and trying to get attention all at the same time.”

Cohen also said the recorded video messages reminded him of the ones filmed by suicide bombers.

“I see an angry guy here who is trying to make a statement to the world,” he said. “He wants us to know this was a planned homicide.”

Forensic psychiatrist Michael Welner, an associate professor of psychiatry at the NYU School of Medicine, said Cho fit the profile of a paranoid schizophrenic.

“Paranoia, in my professional experience, is the most important element to understand in the possible motives of mass shootings,” he told ABCNews.com. “Virtually all mass shooters are paranoid to some pathological degree.”